Cisco Catalyst 2950 User Manual

Contents
xiv
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-12
Understanding UplinkFast 15-3
Understanding Cross-Stack UplinkFast 15-5
How CSUF Works 15-6
Events that Cause Fast Convergence 15-7
Limitations 15-8
Connecting the Stack Ports 15-8
Understanding BackboneFast 15-9
Understanding EtherChannel Guard 15-12
Understanding Root Guard 15-12
Understanding Loop Guard 15-13
Configuring Optional Spanning-Tree Features 15-13
Default Optional Spanning-Tree Configuration 15-14
Optional Spanning-Tree Configuration Guidelines 15-14
Enabling Port Fast 15-14
Enabling BPDU Guard 15-15
Enabling BPDU Filtering 15-16
Enabling UplinkFast for Use with Redundant Links 15-17
Enabling Cross-Stack UplinkFast 15-18
Enabling BackboneFast 15-19
Enabling EtherChannel Guard 15-20
Enabling Root Guard 15-21
Enabling Loop Guard 15-21
Displaying the Spanning-Tree Status 15-22
CHAPTER 16 Configuring VLANs 16-1
Understanding VLANs 16-1
Supported VLANs 16-2
VLAN Port Membership Modes 16-3
Configuring Normal-Range VLANs 16-4
Token Ring VLANs 16-5
Normal-Range VLAN Configuration Guidelines 16-5
VLAN Configuration Mode Options 16-6
VLAN Configuration in config-vlan Mode 16-6
VLAN Configuration in VLAN Configuration Mode 16-6
Saving VLAN Configuration 16-7
Default Ethernet VLAN Configuration 16-7
Creating or Modifying an Ethernet VLAN 16-8
Deleting a VLAN 16-10
Assigning Static-Access Ports to a VLAN 16-11

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz